MCQ
$Y$ is


- A$CH_3-(CH_2)_4-CH=O$
- ✓

- C$CH_3-CH_2-CH=O$
- D





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$Hex - 3 - ynal\xrightarrow[\begin{subarray}{l}
(ii)\,PB{r_3} \\
(i)\,Mg/ether \\
(i)\,C{O_2}/{H_3}{O^ + }
\end{subarray} ]{{(i)\,NaB{H_4}}}\,?$